In video games, as in movies, sequels don’t often improve on the originals. As much as the original Clayfighter thumbed its Play-Doh nose at fighting-game conventions — the hurled projectiles, the roundhouse kicks — this sequel buys into those same conventions, making Clayfighter 2: Judgement Clay closer in spirit to Streetfighter II. The backgrounds here are darker and less cartoony, the moves seem much more vicious, and even the addition of goony-looking combatants (including a giant banana) doesn’t compensate for the feeling that the original game was much more fun. B